Tribological behavior of 17–4 PH stainless steel fabricated by traditional manufacturing and laser-based additive manufacturing methods

Wear ◽  
2019 ◽  
Vol 440-441 ◽  
pp. 203100
Author(s):  
Sanjeev KC ◽  
P.D. Nezhadfar ◽  
C. Phillips ◽  
M.S. Kennedy ◽  
N. Shamsaei ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Tribological Behavior ◽  
Manufacturing Methods ◽  
Traditional Manufacturing

scholarly journals The Corrosion of Stainless Steel Made by Additive Manufacturing: A Review

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 516
Author(s):  
Gyeongbin Ko ◽  
Wooseok Kim ◽  
Kyungjung Kwon ◽  
Tae-Kyu Lee
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Relevant Literature ◽  
Corrosion Property ◽  
Corrosion Study ◽  
Direct Laser ◽  
Manufacturing Methods ◽  
Traditional Manufacturing ◽  
Wire Arc Additive Manufacturing ◽  
Am Processes

The advantages of additive manufacturing (AM) of metals over traditional manufacturing methods have triggered many relevant studies comparing the mechanical properties, corrosion behavior, and microstructure of metals produced by AM or traditional manufacturing methods. This review focuses exclusively on the corrosion property of AM-fabricated stainless steel by comprehensively analyzing the relevant literature. The principles of various AM processes, which have been adopted in the corrosion study of stainless steel, and the corrosion behaviors of stainless steel depending on the AM process, the stainless steel type, and the corrosion environment are summarized. In this comprehensive analysis of relevant literature, we extract dominant experimental factors and the most relevant properties affecting the corrosion of AM-fabricated stainless steel. In selective laser melting, the effects of the scan speed, laser power, energy density, and the post-treatment technologies are usually investigated. In direct laser deposition, the most relevant papers focused on the effect of heat treatments on passive films and the Cr content. There has been no specific trend in the corrosion study of stainless steel that is fabricated by other AM processes, such as wire arc additive manufacturing. Given the rising utilization of AM-produced metal parts, the corrosion issue will be more important in the future, and this review should provide a worthwhile basis for future works.

Incorporating Manufacturing Constraints in Topology Optimization Methods: A Survey

2017 ◽  
Author(s):  
Alok Sutradhar ◽  
Jaejong Park ◽  
Payam Haghighi ◽  
Jacob Kresslein ◽  
Duane Detwiler ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Optimization Methods ◽  
Manufacturing Processes ◽  
Complex Geometries ◽  
Manufacturing Constraints ◽  
Post Processing ◽  
Optimization Framework ◽  
Manufacturing Methods ◽  
Traditional Manufacturing

Topology optimization provides optimized solutions with complex geometries which are often not suitable for direct manufacturing without further steps or post-processing by the designer. There has been a recent progression towards linking topology optimization with additive manufacturing, which is less restrictive than traditional manufacturing methods, but the technology is still in its infancy being costly, time-consuming, and energy inefficient. For applications in automotive or aerospace industries, the traditional manufacturing processes are still preferred and utilized to a far greater extent. Adding manufacturing constraints within the topology optimization framework eliminates the additional design steps of interpreting the topology optimization result and converting it to viable manufacturable parts. Furthermore, unintended but inevitable deviations that occur during manual conversion from the topology optimized result can be avoided. In this paper, we review recent advances to integrate (traditional) manufacturing constraints in the topology optimization process. The focus is on the methods that can create manufacturable and well-defined geometries. The survey will discuss the advantages, limitations, and related challenges of manufacturability in topology optimization.

scholarly journals Engineering and Economic Aspects of Additive Manufacturing in Energy Related Industries

2020 ◽  
Author(s):  
Sandip Dutta ◽  
Sagar Dasgupta ◽  
Geetha Chimata
Keyword(s):  
Additive Manufacturing ◽  
Complex Geometry ◽  
Production Methods ◽  
Energy Applications ◽  
Recent Developments ◽  
Subtractive Manufacturing ◽  
Manufacturing Methods ◽  
Manufacturing Techniques ◽  
Traditional Manufacturing ◽  
Am Processes

Additive manufacturing is the buzz word these days and many companies are leaning on this technology to leap forward in un-chartered design space that promises to give better performance at impossible to reach design goals with the current manufacturing methods. This paper addresses recent developments that have occurred in Energy related businesses with the adoption of 3D printing, also known as Additive Manufacturing (AM). It covers what and why of additive manufacturing; what constitutes energy and AM industry; current activities in AM for energy; AM for different energy sectors; AM processes; AM applications; selected patents in additive manufacturing associated with energy applications; and economic and financial aspects of AM in energy related industries. In this review paper it was noted that in-spite of phenomenal growth in AM, it seldom replaces traditional production methods due to associated constraints. Many companies are finding complimentary AM processes along with subtractive manufacturing techniques to meet the market demands. However, AM is particularly advantageous and attractive compared to traditional manufacturing methods for low volume complex geometry parts.

Twin-Web Turbine Discs: Part 2 — Fabrication and Processing

2018 ◽  
Author(s):  
Boris Vasilyev ◽  
Liubov Magerramova ◽  
Anton Salnikov ◽  
Nikolay Tsykunov ◽  
Vladimir Isakov ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Additive Manufacturing ◽  
Eddy Current ◽  
Hot Isostatic Pressing ◽  
Operating Conditions ◽  
Post Processing ◽  
Cyclic Life ◽  
Closed Cavity ◽  
Manufacturing Methods ◽  
Traditional Manufacturing

The first part of this paper shows that the implementation of twin-web (hollow) discs can lead to an 8–30% decrease in mass or to a cyclic life increase of up to 300%, depending on the size of the disc and the operating conditions. The second part of this paper describes the results of the development of approaches for the manufacturing and processing of twin-web discs, both with the help of additive and traditional manufacturing methods. Several hollow discs with a closed cavity and a slot in the hub are made from the heat-resistant nickel alloy EI698P with the help of additive manufacturing (AM) and hot isostatic pressing (HIP), respectively. Various welding methods are considered for the production of the twin-web discs. The effect of post-processing on the characteristics of the materials is investigated in specimens that were produced with AM methods. Special attention is paid to the surface treatment methods that should be used for discs manufactured by AM methods. The “printed” discs were controlled using radiographic, ultrasonic, fluorescent penetrant, and eddy current methods, and they were examined using computed tomography. As a result, this paper shows that different approaches can be used for the manufacturing and processing of twin-web discs.

scholarly journals Effects of Additive Manufacturing on the Mechanical and Corrosion Properties of Austenic Stainless Steel

2019 ◽  
Vol 2 (1) ◽  
pp. 55-60
Author(s):  
János Endre Maróti ◽  
Dávid Miklós Kemény ◽  
Dóra Károly
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Corrosion Properties ◽  
Mechanical And Corrosion Properties ◽  
Traditional Manufacturing ◽  
Printing Direction ◽  
Complex Parts

Abstract Additive manufacturing (AM) offers the possibility to produce complex parts without the design constraints of traditional manufacturing routes. Our aim was to determine different mechanical and corrosion properties of direct metal laser sintered austenitic stainless steel (X2CrNiMo17-12-2) material with tensile test, Charpy impact test, scanning electron microscopy and corrosion test. The measured values were evaluated, and our results compared with literary values, furthermore, we also examined how the printing direction affects the properties.

Determining the tribological behavior of 316L stainless steel with lubricating micro-channels produced by the selective laser melting (SLM) method

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kerem Turalıoğlu ◽  
Merve Taftalı ◽  
Fatih Yetim
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Tribological Behavior ◽  
Surface Geometry ◽  
Laser Melting ◽  
Content Type ◽  
Manufacturing Method ◽  
Wear Rates ◽  
Micro Channels

Purpose This study aims to produce lubricating surfaces with micro-channels by the selective laser melting (SLM) method, and to investigate their tribological behavior. Design/methodology/approach In this study, three kinds of samples with different geometries were designed, impregnated with oil and then subjected to flow analysis in a virtual environment using Ansys Fluent software. According to the results of these analyses, the best-lubricated surface geometry sample was identified, and a number of geometries were produced by SLM, which is one of the additive manufacturing methods. Tribological tests were performed using a pin-on-disk tribometer with a stainless steel ball as the contact surface. The structural and morphological features were investigated by a three-dimensional profilometer and scanning electron microscopy. Findings The results obtained showed that the impregnated oil reached the surface of the sample compared to untreated samples, and it was seen that the wear rates were reduced, and that the impregnated oil samples exhibited the highest wear resistance. Originality/value In this study, solid geometries that are difficult to be produced by other methods are produced with additive manufacturing method, and the surfaces have been given lubricating properties.

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